But, yes. There are some online screening tests avaiable. Here is a Canadian screening test that covers symptoms of anxiety and depression. One option is to get a print of the test result to discuss the results with your doctor!
The webpage offers additional tools (anxiety diary) and even a 12-step cognitive-behavioral therapy program for anxiety disorders.
The Hamilton Anxiety Scale is often used by clinicians to evaluate the severity of anxiety symptoms. There is an online version provided by the